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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c015c26d9994396e1f1ee7b39748f17bb2c763e1bc0b6259e977c7302a5db87e' 
  AND token = 'F7ZJah+u59uK8wFtcUoNC2hHmhoTMFulIYiYqu+oxX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}